Some may know better for very specific parts of their business, but in the majority of cases, I would say they do not. More often than not, they're the ones pus

Some may know better for very specific parts of their business, but in the majority of cases, I would say they do not. More often than not, they're the ones pushing for some overwrought site with scrolljacking and needless animation or side-scrolling and the like. The gripes about web sites you see on HN - they're the things clients insist on.